Rolling mill.



H. SACK, DEGD. A. 01:, ADKIHIHTBATRIX.

ROLLING MILL.

APPLICATION IILED 1mm 26, 1907.

- IN VENTOR, #7 @f 6 SHEETS-SHEET l h wn Patented Nov/ 2, 1909.

WITNESSES:

5%5v/Mf 4 .2 //M- ATTORNEY.

H. SACK, DEGD.

A. SACK, ADHINISTBATBIX.

ROLLING MILL.

APPLICATION FILED JUNE 26, 1907.

Patented Nov. 2, 1909.

5 QHEETS-SHEET m,

M R W W QRK R llll ll INVENTOR,

WITNESSES ATTORNEY.

I H. SACK, DEOD.

A. SAOK, ADMINISTRATRIX.

BOLLING MILL. APPLICATION FILED JUNE 26, 1907.

11v VENTOR) .44

A TTOR NE Y.

5 SHEETS-SHEET 3.

m .m N Q fi WITNESSES H. SACK, DEGD.

APPLICATION FILED JUNE 26. 1907.

Patented Nov. 2, 1909.

' 5 SHEETS$HEET 4.

o o I o O O H. SACK, DEOD.

A. on, ADIIKISTRATBIX.

ROLLING MILL.

APPLICATION IILED JUNE 26. 1907.

Patented Nov. 2, 1909.

5 SHEETS-SHEET 5 mm mm W mNQ mmmimm.

11v VENTOR,

WITNESSES: 44 9 MI? 4. 4%:

replacing of the rolls.

- UNITED STATES PATENT owl-e11.

HUGO SACK, DUSSELDORF, GERMANY; ADELHEID SACK ADMINISTBATRIX OF SAIDHUGO SACK, DECEASED,"

ROLLING-HILL.

Specification of Letters Patent.

, Application ma Julie 26, 1907. Serial No. 880,854.-

T 0 all whom it may concern:

Be it known that I, HUGO SACK, a citizen of the German Empire, residingat Dusseldorf, Rhenish'Prussia, Germany, have invented new and usefulImprovements in Rolling-Mills, of which the following is aspecification.

The object of the present invention is to provide, in that class ofrolling mills of which the housings have non-detachable tops, animproved construction which will allow of rapid removal and replacementof the rolls of the mill. The invention will be shown in the firstinstance as applied to a universal girder rolling mill such as thatdescribed in' British Letters Patent No. 23,932 of 1905, but it isequally applicable to any ordinary two-high or three-hi h mill, and totrains having any number 0 stands of rolls.

In the universal rolling mill described in said Letters Patent, housingsare shown of the open type, that is, with detachable tops. Now, if it isrequired to use housings with non-detachable tops, in order to obtaingreater strength and rigidity, which is, of course, a very greatadvantage, considerable difliculty is experienced in the removal and Theobject of the present invention is to provide a construction by whichthis difiiculty, is overcome.

In the accompanying drawings, Figure l is a front elevation, partly insection, of a universal girder-rolling mill of the character describedin said British patent above referred to; Fig. 2 is a similar view ofthe same showing the parts in the position assumed during removal of therolls; Fig. 3 is a plan view of the mill, certain parts being omitted;Fig. 4 is a vertical cross section thereof; Fig. 5 is a horizontalsection; Fig. 6 is a plan view of the modified form of mill shown'alsoin Fi s. 7, 8 and 9; Fig. 7 is a vertical section 0 thesame; Fig. 8 is asectional side view of sald modified form, the housings being at theirnormal distance apart; Fig. 9 is a similar view of the same after thehousings have been moved wide apart.

Referring to the drawings, the housings 1, 2, 3, f1, are of the formusual in closed housings, and are such as could be employed for areversing mill, so that inplace of the universal mill rolls described insaid pp patent, ordinary two-high rolls could be .ings. which fitexactly between the two housings train could be employed equally wellboth for a universal mill and for a section, or bar, mill. This isnaturally a great advantage, and one that has not previously beenobtained in any other form of un1- versal girder-mill.

By means of pairs of said housings are supported the lower roll frames5, their ends 6 extending into the openings in the hous- Each lowerframe has shoulders 7,

of its stand, as clearly shown in Fig. 1, so that said frames likewiseserve as distance pieces for maintaining said housings at their normaldistance apart. The distance to which the housings can move from oneanother is limited by means of bolts 8, which pass through saidshoulders 7 and also through the housings, and which are provided-withsuitable cotters 9.

.The ends 10 of the upper frames 11 fit into the bearings 12, whichbearings can move up and down in the housings, and are guided by meansof guide pieces 13, best shown in Figs. 4 and 5. The endwise movement ofeach frame is limited by means of screws 14. The vertical rollsdescribed in the specification of said Letters Patent are omitted inorder to simplify the drawings, although the guides 15 for thesevertical rolls, with their inclined faces, appear. It is evident fromthe above described construction that, so long as the housings remainstationary, the upper frame, their bearings therefor, and the upperhorizontal roll, can have a vertical movement only. The weight of theseparts, that is, the bearings, upper frame, and upper .roll, is

employed in the housings, and the same counterbalanced by rods 16actuated byany usual means such as an hydraulic cylinder 16, one ofthese cylinders being arrangedunder each housing,.although, forclearness of illustration, these counterbalancing cylinders are omittedin Figs. 1, 2 and 3. Such cylinders,not here shown, are also providedfor the stools of the intermediate spindles. The raising and the lowerinof the upper roll and the corresponding ame are controlled by means ofscrews 17 gearing 18 and motors 19, in the usual manner, said motorsbeing carried on H-beams 20.

In order to change the rolls in a universal irder-mill, the housings aremoved apart y means of an hydraulic cylinder. This has already been donein the case of bloom mills, but in the present apparatus such 1mechanism is employed, not only for simultaneously moving apart thehousings of two or more stands, but also to perform the same functionfor the spindles and wabblers, and to draw oil the coupling collars, soas to leave the roll ends free. In Figs. 1 to 5 are shown two stands,the one on the left car ing the roughing rolls, and that on the rig tthe finishing rolls. As shown, however, in Figs. 7, '8, and 9, theprocess of rolling can be distributed over three or more stands in thesame train, and one housing of each stand can he slid apart from theother housing thereof in a single movement. In the mechanism shown in Fis. 1, 2 and 3, this longitudinal movement is only applied to thehousings 2, and 4. This is done by means of the hydraulic cylinders 21and 22, of which the single cylinder 21 moves said housings 2 and 4 tothe right, to separate them from the other housings 1 and 3 of thestands, while the two cylinders 22 return the housings to their originalposition.

The apparatus required for the above mentioned changing of the rolls,frames, and other parts, is best shown in Fig. 3. The housings 2 and 4to be moved are connected together by means of distance rods 23, whichare connected by nuts or cotters 24 to the several housings. The rods 23slide freel through the fixed housing 3 and throug the spindle tool 25.This stool also slides, being moved toward housing 3 by the shift ing ofthe housing 2 and ad acent couplings 30 and being returned to its normalposition by the rods 31, in the free ends of which are cotters 31 whichstrike the base of the stool. The other ends of the rods 31 are securedto the housing 2.

Fig. 2 illustrates the manner in which the complete upper frames withtheir guides 15, and also the upper horizontal rolls, can be lifted outtogether. Since the H-beams 20, for connecting the housings at the topand for supporting the motors, are arranged at the side, as shown inFigs. 1, 2 and 4, the crane is enabled to have free access to the partsto be lifted, so that the crane chains 26 can be easily connected tosaid parts and they can be lifted from the middle to one side, as bestshown in Fig. 3. When removing the rolls, the following is the method ofprocedure. After the housings have been drawn apart, the upper framewith the upper horizontal roll is first removed, then the vertical rollsare removed, and lastl the lower horizontal roll 27. The lower rame 5,with its guides, and its bearings 28, remains in the housings, and forthis purpose, as shown in Fig. 2, the ends 6 of each lower frame 5 areformedlong-enough to remain supported by its housings after the latterhave been separated. However, the same result would be obtained byproviding a suit- When preparing to move the housings apart, care mustbe taken to see that each connection is loosened midway between the twohousings, and that the spindles 29 bearing the couplings 30 are quiteclear to their ends. On closing up the housings again, the stool for thecoupling-spindles is slid back again into its normal position midwabetween the two housings of a pair, while at the same time the collarsor couplings 30 are slid on to the ends of the new set of rolls by handor otherwise, and the whole train is again cou led up.

For simp icity of construction it is desirable that, in disassembling orassembling, all

movable parts should be moved in the same direction. The rolls aretherefore moved with one of the housin of their pair, and to permit ofsaid rollsi eing moved lengthwise to clear the stationary housing it isnecessary also to move back the stool and the spindles carried thereby.In this movement the stool 32, between the housing 1 and the pinionhousing 33, takes no part. So also the couplings 34, 35, for thespindles between the pinion housing and the stand nearest to it remainunmoved. The rolls of the first stand simply slide out of their couplingsleeves or collars 34, and are guided in again when the housings aremoved together again. To permit such movements of the housings, withtheir counterbalancing apparatus, suitable connections for the hydrauliccounterbalancing cylinders, both of the rolls and of the spindle stools,are provided, such as jointed pipes, flexible tubing, or pipes slidingthrough stufiing boxes.

In Figs. 6 to 9 the invention is shown as applied to the rapid changingof the rolls of an ordinar rolling mill, for example, a reversing mil,which has three stands of rolls, and in which each pair of housings areseparated at the same time, as well as the coupling collars removed fromthe ends of the rolls.

Figs. 6 and 8 show the train with the normal distance between thehousings, and Fig. 9 shows the same train after the housings have beenmoved apart. In order that it may be possible to remove the couplings 38by the bed plate.

hydraulic cylinders, any desired housing or to that in the modificationshown in Figs. 1 to 5, the left hand housings, namely 41, 43,- 45, beingnow moved to the left, those on the right, 42, 44, 46, remainingstationary. These housings are all connected at the bottom by means ofverypowerful connecting rods 40 actuated by the hydraulic cylinders 4748 at opposite ends of the train, and provided with cotters 49. If anyhousing is not required to be moved the cotters 49 are simply taken out,so that the rods 40 pass freely through these housings without movingthem. This also applies to the top connections and the holding downbolts, by means of which the housings and stools are secured In this wayit is plain that, by admitting pressure water to the stool can be movedlaterally, sliding on the bed plates, which are of the usual form. Thislateral movement is continued until the train has arrivedat the positionshown in Fig. 9, and the couplin collars 30 are thereby slid along thecoup ing spindles 29 until the ends of the rolls are left quite free.The rolls are still supported at the ends of their journals in thebearings, but they can be lifted clean out by a simple operation withoutnecessitating the removal of the bearings.

The collars 38 between the first stand and the pinion-housing 33 aremade somewhat longer than the others, and the intermediate spindles 50between the inion housing 33 and the first stand are ma ecorrespondingly shorter than the distance between the pinion ends andbeginning of the first stand of rolls, the difference being sufficientto allow of the sliding of the stand housings toward the pinion housing.Otherwise the method of procedure is the same as that already describedin regard to the first construction. The stools 25 of the intermediatespindles slide a certain distance, and are brought back by the rods 31into their original position midway between the two neighboring stands,as soon as the housings are themselves brought together again by thehydraulic cylinders 47. The stool 32 between the pinion housing and thefirst stand does not take part in the movement, but remains stationary.

I claim 1. In combination with a pair of housings constituting a millstand, a roll-supporting member having sliding connections with thehousings and adapted to support a roll therebetween, said housings andmember being I constructed and arranged to permit that housings to bemoved apart and the roll to be lifted from its support. I p

2. In combination with a pair of housings constituting a mill stand, aroll supporting member having sliding connections with the housings andadapted to support a roll therebetween, said housings and member beingconstructed and arranged to permit the housings to be moved apart andthe roll to be lifted from its support while the support is held inplace by its connections with the housings, substantially as described.

3. In combination with a pair of housings constituting a mill stand, aroll supporting member having sliding connections with the housings andadapted to support a roll therebetween, said housings and member beingconstructed and arranged to permit the housings to be moved apart andthe support to beli-fted from between the housings, substantially asdescribed.

4. In a rolling mill, the combination of a plurality of stands ofhousings in line, one stand of each housing being movable to and fromthe other, longitudinally-movable spindles between the stands, and meansfor simultaneously shifting the movable housings and spindles in thesame direction, substantially as described.

5. In a rolling mill, the combination of a plurality of stands ofhousings in line, the inner stand of one housing being movable to andfrom the other housing, longitudinally-movable spindles between thestands, and a movable stool supporting said spindles.

6. In a rolling mill, the combination of a plurality of stands ofhousings in line, the inner stand of one housing being movable to andfrom the other housing, longitudinally-movable spindles between thestands, a movable stool supporting said spindles and means connected tosaid movable stand for returning said stool to its normal position.

7. In a universalrollin mill, stands having guideways, a pair 0horizontal rolls, horizontal-roll carriers extending between and havingends in said guideways, devices on the upper horizontal-roll carrierwhereby vertical movement of said carrier shifts the vertical rolls, andcounterbalancing means supporting each end of said upper carrier.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

HUGO SACK.

\Vitnesses M. EN GELS, ALFRED POI-ILMEYER.

